IEC 61892-1:2019

Mobile and fixed offshore units - Electrical installations - Part 1: General requirements and conditions

IEC 61892-1:2019 is applicable to electrical installations and equipment in mobile and fixed offshore units, including pipeline, pumping or "pigging" stations, compressor stations and single buoy moorings, used in the offshore petroleum industry for drilling, production, accommodation, processing, storage and offloading purposes.
It applies to all installations, whether permanent, temporary, transportable or hand-held, to AC installations and DC installations without any voltage level limitation. Referenced equipment standards may give voltage level limitations.
This document specifies requirements such as those concerning
– environmental conditions,
– power supply characteristics,
– location of electrical equipment in units,
– protection against external influences,
– protection against electrical shock, and
– ignition source control.
This document gives information and guidance on topics such as
– cold climate protection, and
– surface treatment and protective painting system.
This document does not apply to
– fixed equipment for medical purposes,
– electrical installations of tankers, and
– control of ignition sources other than those created by electrical equipment.
This fourth edition cancels and replaces the third edition published in 2015. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) voltage limitations have been removed;
b) definitions for fixed offshore units and mobile offshore units have been included;
c) tables for ambient air temperature and relative humidity have been removed, as this information will normally be given in owner's/operator's documentation for specific projects;
d) the requirement as to ignition source control has been moved from IEC 61892-7 to this document;
e) tables for voltage characteristics have been updated;
f) requirements for a minimum degree of protection for equipment have been moved from IEC 61892-2 to this document.

Unités mobiles et fixes en mer - Installations électriques - Partie 1: Exigences générales et conditions

L'IEC 61892-1:2019 s'applique aux installations et équipements électriques des unités mobiles et fixes en mer, y compris les canalisations, les stations de pompage ou de raclage, les stations de compression et les systèmes d'amarrage à point unique, qui sont utilisés dans l'industrie pétrolière en mer (offshore) pour le forage, la production, les lieux d'habitation, le traitement, le stockage et le déchargement.
Elle s'applique à toutes les installations, qu'elles soient permanentes ou provisoires, transportables ou portatives, aux installations en courant alternatif et aux installations en courant continu sans aucune limitation du niveau de tension. Les normes des équipements référencés peuvent fournir des limites de niveau de tension.
Le présent document spécifie des exigences pour
– les conditions d'environnement,
– les caractéristiques du système d'alimentation,
– la localisation des équipements électriques dans les unités,
– la protection contre les influences externes,
– la protection contre les chocs électriques, et
– la gestion des sources d'incendie.
Le présent document fournit des informations et des recommandations à propos de sujets tels que
– la protection contre le climat froid, et
– le traitement de surface et le système de peinture protectrice.
Le présent document ne s'applique pas
– aux équipements fixes destinés aux applications médicales,
– aux installations électriques des navires-citernes, et
– au contrôle des sources d'incendie autres que celles générées par l'équipement électrique.
Cette quatrième édition annule et remplace la troisième édition parue en 2015. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) les limites de tension ont été supprimées;
b) les définitions pour les unités fixes et mobiles en mer ont été incluses;
c) les tableaux pour la température ambiante de l'air et l'humidité relative ont été supprimés, étant donné que ces informations seront normalement indiquées dans les documents du propriétaire/de l'opérateur pour des projets spécifiques;
d) l'exigence relative à la gestion des sources d'incendie a été déplacée de l'IEC 61892-7 au présent document;
e) les tableaux pour les caractéristiques de tension ont été mis à jour;
f) les exigences pour un degré minimal de protection des équipements ont été déplacées de l'IEC 61892-2 au présent document.

General Information

• Status: Published
• Publication Date: 08-Apr-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 47.020.60 - Electrical equipment of ships and of marine structures
• Technical Committee: TC 18 - Electrical installations of ships and of mobile and fixed offshore units
• Drafting Committee: MT 18 - TC 18/MT 18
• Current Stage: PPUB - Publication issued
• Start Date: 19-Apr-2019
• Completion Date: 09-Apr-2019

Relations

• Revises: IEC 61892-1:2015 - Mobile and fixed offshore units - Electrical installations - Part 1: General requirements and conditions
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61892-1 ®
Edition 4.0 2019-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Mobile and fixed offshore units – Electrical installations –
Part 1: General requirements and conditions

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
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Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

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need further assistance, please contact the Customer Service

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IEC 61892-1 ®
Edition 4.0 2019-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Mobile and fixed offshore units – Electrical installations –

Part 1: General requirements and conditions

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.60 ISBN 978-2-8322-6822-3

– 2 – IEC 61892-1:2019 RLV © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirements and conditions . 14
4.1 General . 14
4.2 Acceptance of substitutes or alternatives . 14
4.3 Additions and alterations . 14
4.4 Environmental conditions . 14
4.4.1 General . 14
Design parameters .
4.4.2 Ambient temperature . 16
Materials .
4.5 Power supply system characteristics . 16
4.5.1 General . 16
4.5.2 AC distribution systems . 17
4.5.3 DC distribution systems . 20
Manual disconnection .
Electrical apparatus for explosive gas atmospheres .
4.6 Clearance and creepage distances . 21
4.7 Insulation . 22
Maintenance and inspection .
Cable entries .
4.8 Precautions against vibration and mechanical shock . 22
4.9 Location of electrical equipment in units. 22
4.10 Mechanical protection . 23
4.11 Protection from against heat, water, steam and oil . 24
4.12 Protection against electrical shock . 24
4.13 Enclosures . 24
4.14 Ignition source control . 24
4.14.1 General . 24
4.14.2 Emergency shutdown (ESD) – General . 25
4.14.3 Emergency conditions due to drilling operations – Mobile drilling units . 26
4.14.4 Manual electrical shutdown . 26
4.15 Degree of protection of equipment by enclosures . 26
4.16 Environmental impact. 29
Annex A (informative) Degree of protection . 30
Annex B (informative) Cold climate precautions . 32
B.1 General . 32
B.2 Emergency power source . 32
B.3 Equipment – General . 32
B.4 Cables and cable installations . 33
B.5 Electrical trace heating systems . 33
B.6 Lighting systems . 33
B.6.1 General . 33

B.6.2 Emergency lights . 33
B.7 Electrical rotating machines . 33
B.8 Explosion protected equipment . 33
Annex C (informative) Specification of surface treatment and protective painting
system . 34
C.1 Objectives . 34
C.2 General and specification. 34
C.2.1 General . 34
C.2.2 Atmospheric corrosivity categories for protective painting systems . 34
C.2.3 Durability performance of a protective painting system . 35
Annex D (informative) DC distribution systems.
D.1 DC distribution systems .
Bibliography . 38

Figure D.1 – Typical configuration of DC distribution system .

Table – Operational design parameters – Ambient temperature .
Table – Design parameters – Relative humidity .
Table 1 – Voltage characteristics . 17
Table 2 – Frequency characteristics . 19
Table 3 – Tolerances for DC system . 20
Table 4 – Fast transients . 21
Table 5 – Minimum requirements for the degree of protection for mobile and fixed
offshore units . 27
Table A.1 – Degrees of protection against foreign objects indicated by the first
characteristic numeral . 30
Table A.2 – Degrees of protection against water indicated by the second characteristic
numeral . 31
Table C.1 – Description of typical atmospheric environments related to the estimation
of corrosivity categories . 35

– 4 – IEC 61892-1:2019 RLV © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MOBILE AND FIXED OFFSHORE UNITS –
ELECTRICAL INSTALLATIONS –
Part 1: General requirements and conditions

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC
Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
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...

IEC 61892-1 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Mobile and fixed offshore units – Electrical installations –
Part 1: General requirements and conditions

Unités mobiles et fixes en mer – Installations électriques –
Partie 1: Exigences générales et conditions

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
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once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.

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IEC 61892-1 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Mobile and fixed offshore units – Electrical installations –

Part 1: General requirements and conditions

Unités mobiles et fixes en mer – Installations électriques –

Partie 1: Exigences générales et conditions

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.60 ISBN 978-2-8322-6663-2

– 2 – IEC 61892-1:2019 © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirements and conditions . 13
4.1 General . 13
4.2 Acceptance of substitutes or alternatives . 14
4.3 Additions and alterations . 14
4.4 Environmental conditions . 14
4.4.1 General . 14
4.4.2 Ambient temperature . 14
4.5 Power supply system characteristics . 14
4.5.1 General . 14
4.5.2 AC distribution systems . 15
4.5.3 DC distribution systems . 18
4.6 Clearance and creepage distances . 19
4.7 Insulation . 19
4.8 Precautions against vibration and mechanical shock . 19
4.9 Location of electrical equipment in units. 19
4.10 Mechanical protection . 20
4.11 Protection against heat, water, steam and oil . 20
4.12 Protection against electrical shock . 21
4.13 Enclosures . 21
4.14 Ignition source control . 21
4.14.1 General . 21
4.14.2 Emergency shutdown (ESD) – General . 22
4.14.3 Emergency conditions due to drilling operations – Mobile drilling units . 23
4.14.4 Manual electrical shutdown . 23
4.15 Degree of protection of equipment by enclosures . 23
4.16 Environmental impact. 26
Annex A (informative) Degree of protection . 27
Annex B (informative) Cold climate precautions . 29
B.1 General . 29
B.2 Emergency power source . 29
B.3 Equipment – General . 29
B.4 Cables and cable installations . 29
B.5 Electrical trace heating systems . 29
B.6 Lighting systems . 30
B.6.1 General . 30
B.6.2 Emergency lights . 30
B.7 Electrical rotating machines . 30
B.8 Explosion protected equipment . 30
Annex C (informative) Specification of surface treatment and protective painting
system . 31
C.1 Objectives . 31

C.2 General and specification. 31
C.2.1 General . 31
C.2.2 Atmospheric corrosivity categories for protective painting systems . 31
C.2.3 Durability performance of a protective painting system . 32
Bibliography . 34

Table 1 – Voltage characteristics . 16
Table 2 – Frequency characteristics . 17
Table 3 – Tolerances for DC system . 18
Table 4 – Fast transients . 19
Table 5 – Minimum requirements for the degree of protection for mobile and fixed

offshore units . 24
Table A.1 – Degrees of protection against foreign objects indicated by the first
characteristic numeral . 27
Table A.2 – Degrees of protection against water indicated by the second characteristic
numeral . 28
Table C.1 – Description of typical atmospheric environments related to the estimation

of corrosivity categories . 32

– 4 – IEC 61892-1:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MOBILE AND FIXED OFFSHORE UNITS –
ELECTRICAL INSTALLATIONS –
Part 1: General requirements and conditions

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC
Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates clo
...